港口起重机使用三排滚柱式回转支承，因为他能够同时承载各种载荷，是承载能力最大的一种结构形式，轴、径向尺寸都较大，结构牢固，三排滚柱式回转支承特别适用于要求较大直径的重型机械，如港口起重机，船用起重机等。131.50.3550
Three row roller slewing bearing can bear different loads simultaneously. The capacity load is the largest one comparing with other type slewing bearing. Due to the large axial and radial dimension & solid structure, it is especially suitable for heavy-duty machinery, such as harbor crane,ship crane, etc.
